i899 C. UPTON— BRACHIOFODA I29 



8. RHYNCHONELLA JURENSIS (jQjienstedt) 



PI. III., figs. 14—17. 



1858. Terebratula JURENSIS, Qiienst., Der Jura, 

 p. 287, tab. xli., figs. 33—35. 



1878. RHYNCHONELLA JURENSIS, Dav., Supp. Brit. 

 Juras. and Trias. Brach., Vol. IV., pi. xxvii. 

 figs. 24 — 27. 



A small Rliynchonella which has been identified as 

 Quenstedt's Jiirensis is found in the Upper Lias — Zone 

 of Am. communis — of the neighbourhood of Banbury. 

 There is possibly some little doubt about the identity, but 

 nevertheless the Banbury fossil is always referred to as 

 R. jurensis. The fossil has not hitherto been correctly 

 recorded from any other British locality to my knowledge. 

 I have, however, found two specimens in beds of the same 

 age on the southern slope of Doverow Hill, near 

 Stroud, and another from the Margaritaius beds of the 

 Middle Lias at Haywardsfield. Dr Davidson figures the 

 species in the Supplement to his Monograph (pi. xxvii., 

 figs. 24 — 27), but the figures do not bring out well the 

 peculiar flatness of the brachial valve which is charac- 

 teristic of the English specimens. 



9. RHYNCHONELLA COTTESWOLDI^, sp. n. 



PI. IIL, figs. 18—22. 



1878. RHYNCHONELLA RIMOSA, (non VOn BucJi) Dav. 

 Supp. Brit. Juras. and Trias. Brach., 

 Vol. IV., pi. xxvii., figs. 10, loa. 



Diagnosis. — Shell small, nearly circular in outline, slightly 

 wider than long ; pedicle valve rather flat ; brachial valve 

 very convex, umbo considerably inflated ; beak acute, sub- 

 erect, slightly truncated by the foramen which is small 

 and encroaches on the valve ; deltidial plates apparent and 



